defragster
Senior Member+
I've put headers on my LC's and 3.1 and 3.2 units that are common so far. So I can plug one or the other onto the same PCB.
PROBLEM/QUESTION: I made a board with a battery to support the T_3 RTC on VBat.
What happens to the LC when it is plugged onto that T_3 RTC board with VBat battery power present on what is the T_LC pin 17 output pin?
Doing some ILI9341 display work and Not realizing the effect/difference I dropped the LC most of the way on and saw the LED light and then yanked it off wondering what I did? I expect it was not USB powered during the changeover.
The T_LC still seems to work - but I have never used pin 17. Seeing the LED light has me wondering it the RTC battery was back-feeding VIN and powering the teensy or if it was doing something else? Decided I should ask rather than just try it again.
PROBLEM/QUESTION: I made a board with a battery to support the T_3 RTC on VBat.
What happens to the LC when it is plugged onto that T_3 RTC board with VBat battery power present on what is the T_LC pin 17 output pin?
Doing some ILI9341 display work and Not realizing the effect/difference I dropped the LC most of the way on and saw the LED light and then yanked it off wondering what I did? I expect it was not USB powered during the changeover.
The T_LC still seems to work - but I have never used pin 17. Seeing the LED light has me wondering it the RTC battery was back-feeding VIN and powering the teensy or if it was doing something else? Decided I should ask rather than just try it again.